VSR Auxiliary Battery via a ‘Voltage Sensitive Relay’ or ‘VSR’.

Running a lot of equipment from your vehicle while the engines not in use, this system allows you to use allocated electrical demand from the aux battery while keeping the main vehicle starter battery at full charge. Great for work service vehicles, campers etc. We’ve even fitted to a ute used for show dogs so they can run their cage cooling fans during the day while parked up and have no fear of the flat battery at the end of the show.